磺基水杨酸光度法测定金属锌中铁含量不确定度的评估和计算

EVALUATION AND CALCULATION OF UNCERTAINTY IN DETERMINATION OF IRON IN ZINC METAL BY SULFOSALICYLIC ACID SPECTROPHOTOMETRY

探讨了磺基水杨酸光度法测定金属锌中铁含量不确定度的评估和计算方法。结果表明 ,对0 0 0 12 %铁的测定有 95 %的可能性铁的含量在 0 0 0 115 %～ 0 0 0 12 5 %之间。通过对金属锌中铁A类标准不确定度的评定和B类标准不确定度的评定计算结果可以看出 。

A method was studied for evaluation and calculation of uncertainty in determination of iron in zinc metal by sulfosalicylic acid spectrophotometry The determination content for 0 0012% iron is between 0 00115% and 0 00125% at the 95% confidence level The results,for evaluation and calculation of type A uncertainty and type B uncertainty,show that the uncertainty of this method mainly roots in type A uncertainty